4 Stone Coasters - Approximately 4 Inch Diameter These absorbent stone coasters were hand-stamped and painted in black and red ink. Feel free to customize the ink colors to the following (see the final picture of the roosters above for example of each color in order from right to left): red, fuschia, pink, orange, yellow, olive green, lime green, green, forest green, teal, blue, navy, purple, brown and black. Each stone coaster offers unique dents and warm tones. No stone is alike! I hand-stamp and paint the design(s) and bake the stones to heat set the ink. No chemical sealants are used, so the stones remain naturally absorbent. Lastly, cork is on the bottom of each stone to protect your furniture! As a result, these coasters are not dishwasher safe.